How much weight do you lose when you have a baby?

Last year, my best friend was 7 months pregnant. However, she had to have an abortion (the baby had a cleft lip). After the abortion, she lost a good 15 to 20 pounds Anyway, because i can honestly lose a few pounds myself, 6 months ago i also became pregnant. I am aborting tomorrow. How much weight do you think i'll lose?